Decode string to valid JSON in javascript or jQuery

Question

I am rendering string javascript variable init statements at server side (using ASP MVC, but I do not think it matters) The string variable content is a valid JSON at server side, and encoded when rendered to html. My rendered statement looks like this:

 var myvariable = '{&quot;prefix&quot;:&quot;&quot;,&quot;name&quot;:&quot;Grid&...

Quatation marks and other special chars in the string were encoded to html entities, which is completely OK, unless this encoding the variable declaration would by syntactically incorrect.

However I must get back the original string content at client side which was a correct JSON at server side. How can I accomplish this with javascript or jQuery? (Please note, then I do know how to get a javascript object from JSON, I am not asking for that)

MrVentzi · Accepted Answer · 2015-05-08 09:24:59Z

1

How about?

var myjsonobject = JSON.parse(decodeHtml(myvariable));
function decodeHtml(html) {
    var txt = document.createElement("textarea");
    txt.innerHTML = html;
   return txt.value;
}

Note that it's not tested

EDIT: Tested it https://jsfiddle.net/Lmz20s5z/

EDIT2: *See the console log for results

edited May 8, 2015 at 9:24

answered May 8, 2015 at 9:17

MrVentzi

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Comments

joakim · Accepted Answer · 2015-05-08 09:14:02Z

0

On server side you can escape quotation marks with a backspace \" then you can just do JSON.parse(string) on that string clientside.

JSON.parse('{\"prefix\":\"\",\"name\":\"Grid\"}');

answered May 8, 2015 at 9:14

joakim

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1 Comment

g.pickardou Over a year ago

Not only quotation marks are there, but script parts also. I do not want to reinvent the wheel, ASP MVC have server side infrastructure to render a correct html string by escaping all specials with html entities. Now I am looking for the inverse transformation in javascript or jQuery

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